Which command is used to install packages in a Debian-based system?

In a Debian-based system, the command used to install packages is apt-get. This command is a part of the Advanced Package Tool (APT) and is widely used for managing packages in distributions that are based on Debian, such as Ubuntu. When you use apt-get install package-name, it connects to the repositories defined in your system, retrieves the necessary files, and installs the software packages along with any dependencies they may require.

The other commands listed are used in different Linux distributions. For instance, dnf is the package manager for Fedora and CentOS/RHEL 8 and later, handling package installation and management in those systems. Similarly, yum was the traditional package manager for CentOS and RHEL 7 and earlier, while zypper is specific to openSUSE and is used for package management in that distribution. Thus, knowing which command belongs to which package manager is crucial in understanding and managing software installations across various Linux environments.